[FLINK-38685][cdc-connector-postgresql] Redact sensitive information like password from logs #4174
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The Flink Postgres CDC connector, when initialising, logs the complete connector configuration, including the database.password property, in plain text to the TaskManager logs.
This fix redacts such sensitive information from being leaked in logs.
Current behaviour
2025-11-14 11:04:29,954 INFO org.apache.flink.cdc.connectors.postgres.source.fetch.PostgresSourceFetchTaskContext [] - PostgresConnectorConfig is {connector.class=io.debezium.connector.postgresql.PostgresConnector, slot.name=flink_cdh_sample_1_3, schema.include.list=public, provide.transaction.metadata=true, include.schema.changes=false, database.sslmode=require, database.history.skip.unparseable.ddl=true, database.sslfactory=org.postgresql.ssl.NonValidatingFactory, database.history.instance.name=6d5b0651-f15b-49f3-a210-32a4654158de_3, database.tcpKeepAlive=true, database.dbname=foo_sample, database.user=foo_user, slot.drop.on.stop=true, database.history.refer.ddl=true, database.server.name=postgres_cdc_source, heartbeat.interval.ms=0, plugin.name=pgoutput, database.port=5432, database.hostname=postgres, database.password=postgres, database.sslrootcert=, table.include.list=public.foo_sample_users, database.history=org.apache.flink.cdc.connectors.base.source.EmbeddedFlinkDatabaseHistory, snapshot.mode=never}After this fix
2025-11-14 12:15:55,320 INFO org.apache.flink.cdc.connectors.postgres.source.fetch.PostgresSourceFetchTaskContext [] - PostgresConnectorConfig is {connector.class=io.debezium.connector.postgresql.PostgresConnector, schema.include.list=public, include.schema.changes=false, database.sslmode=require, database.sslfactory=org.postgresql.ssl.NonValidatingFactory, database.history.instance.name=cdb75629-ee4b-488f-bed7-4566777633b9_2, database.dbname=foo_sample, database.user=foo_user, database.history.refer.ddl=true, heartbeat.interval.ms=0, plugin.name=pgoutput, database.password=******, database.sslrootcert=, database.history=org.apache.flink.cdc.connectors.base.source.EmbeddedFlinkDatabaseHistory, snapshot.mode=never, slot.name=flink_cdh_sample_1_2, provide.transaction.metadata=true, database.history.skip.unparseable.ddl=true, database.tcpKeepAlive=true, slot.drop.on.stop=true, database.server.name=postgres_cdc_source, database.port=5432, database.hostname=postgres, table.include.list=public.foo_sample_orders}